Current-interrupter for use in electric ignition devices of internal-combustion motors.



Patented Nov. 4, 1919.

A. KRAUSS;

C OIIIBUSTION MOTORS; APPLICATION FILED DEC- F. IjSIS.

I C UIIIIEIIT INTERIIUPTER FOR USE IN ELECTRIC IGNITION DEVICES OF INTERNAL L a a 7.. A@ I, i wnlniwm UNITED STATES PATENT oFrIoE.

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Patented Nov. 4, 1919.

Application filled December 7, 1915. Serial I0. 65,520.

To all whom it may concern:

Be it known that I, Anonr Knauas, a subject of the German Em tor, residing at Cannstatt, 8 Brysstrasse, ermany, have invented certain new and useful Im rovements in Current Interrupters for se' in Electric Ignition Devices of Internal-Combustion Motors; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will -enable others skilled in the art to which it up rta ins to make and use the same.

y invention relates .to current inter-- rupters for use in electric ignition. systems for intelrnal combustion motors, and more es ial y to that type of interru ter in wiiiiz h the movable contact piece is astdned to a support, pretax-ably a spring support adapte to be foroed outward by' suitably arranged cams, while'the device is working,

and to 'ellect thereby the interruption of a circuit 'of 'a In 1 or the like. f In the preferredeinbodunent of the interrupter to this invention, normally sta: tionary camsare mounted on the cam ring, care being taken that the are arranged as closely as possible near t e armature shaft with which the interrupter contacts rotate.

This arrangement is favorable to lever in- 'terruptors because even at a high velocity there is no danger of the move le contact arm slinging, an such" tendency bein at once counterac by the constructiona arrangement of the leaf spring system consistmg of a number of supe leaf springs fixed at one end to the central piece of the interrupter while the contact itself is fastened to the outer end of the innermost s rin The new interrupter further ofi'ers t e a vantage of being easily reversible so as to run either way.

The preferred embodiment of the interrupter according to this invention is shown on the accompanying drawings, in which,

Figure 1 is a vertical section on the line 22 (Fig. 2) Fi 2 is an elevation; Figs. 3, 4 and 5 are dil erent side views.

a is the armature shaft, b is the central piece fixed to said shaft, 0 is the stationary contact, d is the arm carrying said contact and fixed to the central piece, strips of inryinginterrupter sulating material being inserted between said arm and said piece. The central piece I; is provided with an am e ca aleaf spring system composed of fiirgber of leaf spriggis and carrymg' the movable con-.; tact g. e spring leaves may be of equal 011; (if different latter case to ongestsp' is oca nearesttothc stationary cor i tlic t. In this manner. the; oscillations of the spring system are strongly damped and all unintentional interrup-. tions of the current are thereby avoided. The" came it are mounted-on the normal! stationary cam ring a and 'as close as possib c to the armature shaft, causing the spring su port f carrying movable cone forced by the came from within toward the, exterior and the contacts to be se thereby in the plane of rotation. T e whole interrupter is fastened in place in a well known manner'by screw 1:. V Qwing to the combination of the. leaf springs f and the cams 6 arranged on the cam ring, no damage bending or breakmg occurs, and. there is no da r of the spring system carrying the mova le contact slinging, due to centrifugal force, even at hi h speed of rotation.

ides, the interrupter may be run both ways and its parts can be made at a very low price and can be assembled very easily.

Havi thus described my invention, what I claim is: r

1. In a current interrupter for electric ig nition systems, a rotatable shaft, an arm fast with said shaft. an interrupter contact .mounted on said arm, a resilient support connected substantially at one end for roa current-cap I in an substantially ar No the axis of rotation of the shaft, a

idefleetable support fastened substantially at IOPO 3. In a current interrupter for electric ignition systems, a rotatable member, an mterrupter contact fast with said member, a spring support composed of super osed fiat stepped leam fastened substantia ly at one en to said-member, a cooperative interrupter contact mounted on the sup rt substantiall at the other end thereo and a norma y stationary cam cooperative with the support.

4. In a cut-rafinterrupter for electric ignition systems, an interrupter contact, a spring su port com of stepped leaves with the ongest lea nearest the axisof rotation of the interrupter, a coil eratn'e mterrupter contact carried by said ongest leaf near the outer end thereof, and. a cam oooperative with the spring support.

5. In a current interrupter .for electric ignition systems, a rotatable member, an interrupter contact fagtasxthfsaid menper, a rin su rt com o steppe eaves i dsuni ed one end to said member with the longest leaf nearest the axis of rotation, a 006 erative interrupter contact mounted near t e other end of the longest leaf of the spring support, and a normally stationary cam coiiperative with the spring support.

6. In a current interrupter for electric ignition systems, a rotatable shaft, a diametsubstantially at the other end of the spring support, anda normally stationary cam positioned between the axis of rotation and the spring support and being cooperative with a central part of the spring support to defiect the su port in the plane of rotation, the distances rom the axis of rotation to the ends of the support being substantially equal.

7. In a current interrupter for electric ignition systems, a rotatable shaft, a diametrically-disposed arm fast with said shaft, an interrupter contact mounted on said arm,

a member fast with said shaft and terminatin in an arm extending-substantially paralle to the 'axis of rotation of the shaft,'a spring support composed of stepped leaves fastened near one end to said terminating arm with the longest leaf nearest the axis of rotation of the shaft, a eoiiperativeinterru ter contact mounted substantially at t 0 other end of the spring support,vand a normally stationary cam positioned between the axis of rotation and the spring support and being cooperative with a central .part of the spring support to deflect it in the plane of rotation.

In testimony whereof I aflixed my signatrue'gin presence of two witnesses.

ADOLF KRAUSS, Winesses:

Pane Wonrasr, Anonr LEBHERT. 

